JPS6236689Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to improvement of vehicle body structure.

As shown in FIGS. 1 and 2, the vehicle body 2
In a vehicle in which a fuel tank 8 is disposed between side frames 4 and 6 extending in the longitudinal direction, when the vehicle body 2 receives a rear-end collision, the side frames 4 and 6 are located inside the vehicle body, that is, the fuel tank 8
It is necessary to increase the rigidity of the joint between the cross member 10, which is installed as a bridge between the side frames 4 and 6, and both side frames so as not to buckle in the direction. In addition, 12 in the figure is a cross member installed between the side frames 4 and 6 in front of the cross member 10, and the front part of the fuel tank 8 is supported by the cross member 12 and the rear part by the cross member 10, respectively. ing.

Here, the side frame 6 (or side frame 4) and cross member 1 in this type of vehicle body are
The structure of the connecting portion with 0 will be explained with reference to FIG.

The cross member 10 has flanges 10a and 10 on both side edges fixed to the lower surface of the floor panel 14.
The side frame 6 has an inner surface 6a facing inward in the vehicle width direction and a lower surface 6b continuous with the inner surface 6a and facing downward at a position lower than the floor panel 14. have. Flanges 10c and 10d are provided on both side edges of the end of the cross member 10, respectively, which are fixed to the inner surface 6a of the side frame 6, and a flange 10e is provided on the lower edge, which is fixed to the lower surface 6b of the side frame 6. ing.

However, in terms of strength between the cross member 10 and the side frame 6, each flange 10a
and between 10c, between 10c and 10e, between 10e and 10d
It is preferable to form the cross member 10, which is a large part, by drawing so that there is no cut between the two parts and between 10d and 10b.
However, this required a considerable amount of deep drawing, resulting in very poor formability.

The present invention was devised to solve the above problems, and includes a side frame extending in the longitudinal direction of the vehicle body, and a cross member extending in the width direction of the vehicle body and having an end fixed to the side frame. The member has a hat-shaped cross section with flanges on both sides in the longitudinal direction fixed to the lower surface of the floor panel, and the side frame is continuous with an inner surface facing inward in the width direction of the vehicle and is connected to the floor panel. In the case where the cross member has a lower surface facing downward at a position lower than the panel, the cross member is attached to the floor panel so that the flanges of the cross member are fixed to the lower surface of the side frame at both ends in the longitudinal direction. It gradually descends from the height of the lower surface of the side frame to the height of the lower surface of the side frame via a slope, and has a vertical wall surface that comes into contact with the inner surface of the side frame, and the flanges on both sides of the side frame are connected to the cross section. The gist of the present invention is a vehicle body structure characterized by comprising reinforcing panels fixed to the upper surfaces of the flanges of the slope portions of the members.

Hereinafter, one embodiment of the present invention will be described in detail with reference to FIGS. 4 and 5. It should be noted that portions in the figure that are substantially the same as those in the conventional structure shown in FIG. 3 are designated by the same reference numerals as used above, and detailed description thereof will be omitted. In this embodiment, the cross member 10 has flanges 10f fixed to the lower surface 6b of the side frame 6 at both ends in the longitudinal direction.
Slope 1 that gradually descends from b to the outside of the car body
Continuous through 0g and 10h. The reinforcing panel 16 has flanges 16a and 16b on both side edges fixed to the upper surfaces of the slopes 10g and 10h of the cross member 10, respectively, and has a vertical wall surface 16c that abuts the inner surface 6a of the side frame 6.
In the figure, 18 is a foil house inner fixed to the outside of the side frame 6, and 20 is an auxiliary frame fixed to the side frame 6, with its inner edge fixed to the floor panel 14 and its outer edge fixed to the foil house inner 18. .

According to the above configuration, the flange 10f of the cross member 10 is formed so as to be continuous with the flanges 10a and 10b via the slopes 10g and 10h, so the amount of reduction during molding of the cross member 10 is shown in FIG. The width of the cross member 1 can be reduced significantly compared to the conventional structure shown.
0 moldability is improved. In addition, against buckling of the cross member 10 that tends to fall inward in the vehicle width direction,
Since the vertical wall surface 16c of the reinforcing panel 16, which cooperates with the cross member 10 to form a closed cross section, is in contact with the inner surface 10 of the side frame 6, there is an effect that sufficient resistance can be achieved.

Note that the reinforcing panel 16 requires drawing, but the cross member 1 shown in FIG.
Compared to machines like 0 that process a part of a large part,
Since the reinforcing panel 16, which is much smaller in size, is subjected to drawing processing, it is well known that this can be carried out very easily on a material stockpile and press processing equipment.

Further, in this embodiment, since the vertical wall surface 16c of the reinforcing panel 16 and the inner surface 6a of the side frame 6 are simply in contact with each other, when the vehicle body 2 receives a rear-end collision, the side frame 6 is Buckling deformation in the opposite direction can be actively tolerated, thereby achieving the effect that the side frame 6 can further avoid the risk of damage to the fuel tank 8.

[Brief explanation of the drawing]

Figure 1 is a plan view showing the entire vehicle body, Figure 2 is a plan view showing the entire vehicle body.
FIG. 3 is a perspective view of a main part showing an example of a conventional structure, FIG. 4 is a perspective view of a main part showing an embodiment of the present invention, and FIG. FIG. 2... Vehicle body, 4, 6... Side frame, 6a
...Inner surface, 6b...Bottom surface, 8...Fuel tank,
10...Cross member, 10a, 10b, 10f
...Flange, 10g, 10h...Slope, 14...
...Floor panel, 16...Reinforcement panel, 16a,
16b...flange, 16e...vertical wall surface.

Claims (1)

[Scope of utility model registration request] The cross member includes a side frame extending in the longitudinal direction of the vehicle body, and a cross member extending in the width direction of the vehicle body and having ends fixed to the side frame, and the cross member has flanges on both sides in the longitudinal direction attached to the bottom surface of the floor panel. The side frame has a fixed hat-shaped cross section, and the side frame has an inner surface facing inward in the vehicle width direction and a lower surface continuous with the inner surface and facing downward at a position lower than the floor panel. In this case, the cross member is oriented from the height of the lower surface of the floor panel to the height of the lower surface of the side frame so that the flanges of the cross member are fixed to the lower surface of the side frame at both longitudinal ends thereof. It gradually descends through a slope,
A vehicle body structure comprising a reinforcing panel having a vertical wall surface in contact with the inner surface of the side frame and having flanges on both side edges fixed to the upper surface of the flange of the slope portion of the cross member.